I added my java application (using JavaFX for the GUI) as a windows service to let it keep running after logoffs. However, if I logoff once and login again, the content of the GUI is gone, I only see an empty window. The rest of the threads for processing datas still remains and works properly as I can see it from the console. The AWT tray icon is also still reactive. So I think it's a JavaFX thing.

edit1: for the gui i used a fxml file
edit2: the service was added using instsrv.exe and srvany.exe from the Microsoft Resource Kit
edit3: i called the application by using java -jar -Xrs app.jar to ignore logoff flags produced by windows which could lead the vm to exit